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In accordance with forced combustion air, how many BTUs correspond to 1 CFM?

  1. 1200 BTUs

  2. 1800 BTUs

  3. 2400 BTUs

  4. 3000 BTUs

The correct answer is: 2400 BTUs

The correct answer is based on the relationship between airflow (measured in cubic feet per minute or CFM) and energy (measured in BTUs, or British Thermal Units) in a forced combustion air system. Specifically, 1 CFM of combustion air is generally accepted to correspond to 2400 BTUs of energy. This value is derived from the typical heat content of the fuel being used and its efficiency in converting airflow into usable heat energy. Understanding this relationship is crucial for professionals working with low pressure boilers, as it impacts how systems are designed, fueled, and operated. Proper combustion air supply ensures efficient burning of fuel, which in turn affects the overall efficiency and safety of the boiler system. Adequate airflow is necessary not only for effective combustion but also for maintaining optimal operating conditions. In summary, knowing that 1 CFM corresponds to 2400 BTUs is an essential factor for professionals in the field, as it assists in calculating heating requirements and ensuring that combustion systems are properly sized and maintained.